Jordy Nelson, Randall Cobb and James Jones often point out there’s no set No. 1, No. 2 or No. 3 receiver on the Green Bay Packers’ depth chart.

There’s far less certainty surrounding the fourth, fifth and even sixth receiver on the roster, but for different reasons.

What’s to be made of those latter classifications ultimately lies in the hands of Jarrett Boykin, Jeremy Ross and the young receivers vying to join the team’s high-octane passing game when the 53-man roster is decided later this month.

Rookies such as Charles Johnson, Tyrone Walker and Myles White have had their moments through the first week of camp, but Boykin and Ross remain the early favorites to assume the spots vacated by cornerstones Greg Jennings and Donald Driver.

“It’s totally wide open,” said Boykin, one of four undrafted rookies to make the roster last season. “You have your proven three and after that we’re all fighting for the next-man-up spot. Honestly me, I just try to take it day by day and come in here and progress from what I did the previous day.”

Boykin and Ross are as different as NFL receivers can be, but both carved out roles as the 2012 season wore on and have been two of the most popular names off the tongues of coach Mike McCarthy and quarterback Aaron Rodgers throughout the offseason.

Ross represents perhaps the most intriguing prospect in camp after joining the team midway through the 2012 season and working his way onto the field as a kickoff and punt returner by the time it was over.

A 28.7-yard per kickoff and 25.8-yard per punt return average during five regular-season games quickly went to the wayside, however, after Ross muffed a punt at his 9-yard line during the Packers’ 45-31 loss to San Francisco in January’s NFC divisional playoffs.

The 25-year-old never feared the misstep would lead to his ouster but returned to camp motivated to not let the next opportunity slip through his fingertips, an attitude on line with McCarthy’s mandate for potential successors to third-year returner and offensive juggernaut Randall Cobb.

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On Wednesday, McCarthy said he’d choose Cobb to be his returner if he needed to play in a game today, but Ross appears to be the next most viable replacement ahead of fourth-round running back Johnathan Franklin and a mess of other rookies and first-year players.

Offensively, the Packers also have started utilizing Ross in a similar capacity as Cobb during practice, finding different ways to take incorporate his skill-set into packages.

“I think even coming into this preseason, just showing a lot of flashes of greatness out there,” said Ross of what he has to do to win the return job. “Making a lot of explosive plays, fielding the ball properly. Making sure I’m catching and securing the ball, and getting the ball upfield. If giving the returning job to me is something they want to do — if I do that, that’s a possibility. That’s a way to get it.”

Boykin, 23, won’t factor into the return game but has a year of experience under his belt after beating out practice-squad holdovers Tori Gurley and Diondre Borel for the sixth and final spot on the team’s 53-man roster.

Originally brought in on tryout at the team’s 2012 rookie orientation, the 6-foot-2, 218-pound receiver wound up playing in 10 games with five catches for 27 yards, including a critical fourth-and-1 snag in the team’s regular-season finale against Minnesota despite being interfered with and coming down hard on an ankle.

Neither Ross nor Boykin would concede that past experience has given them an advantage over the team’s stable of rookies, but it also couldn’t hurt.

“It could, but the best guy is going to play out there regardless of how young you are or how old you are,” said Ross, who was promoted from the practice squad to active roster on Dec. 1. “ It goes back to nothing is going to be handed to us. Nothing is going to be given. We’re going to have to work for everything. Even if there’s like 30 young guys, we still have to work and earn our keep here.”

With Jennings signing with the Vikings and Driver retiring, the Packers drafted a pair of seventh-round receivers, Grand Valley State’s Johnson and Maryland’s Kevin Dorsey, but neither has been able to stay healthy.

There’s plenty of time for an undrafted guy like Walker or recent pickup Omarius Hines to close the gap, but Boykin and Ross remain the receivers of record at the moment.

Unlike last year when Boykin made the team as a developmental project, the Packers could easily find themselves relying on their young receivers once the season starts, especially after nagging injuries to Jennings and Nelson tested the team’s receiving depth last season.

“They’re becoming very comfortable with the offense, and that’s key,” Nelson said. “It’s fun to watch them and at some point in time we’re going to rely on some of these younger guys throughout the season and they’re going to have to be ready to go.”